JPS6238149A - Visible light irradiation apparatus for curing surface of dental material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an irradiation device for curing a photocurable dental composition applied to the surface of a dental material such as a denture base, and particularly to a light source of the irradiation device. It is.

<Conventional technology> Generally, denture bases are made of thermoplastic resin, which has the drawback of not being wear resistant and can easily scratch or stain the surface. The composition is applied and irradiated with light to polymerize a hard film on the denture base or the like. Xenon lamps, halogen lamps, mercury lamps, etc. have been developed as light sources for devices that irradiate light, but all of these have a high calorific value relative to their electricity consumption, causing deformation of the thermoplastic resin used for denture bases, etc. However, it is not possible to ensure the precision required for dentures. Furthermore, light sources such as the above-mentioned xenon lamps lack durability, are expensive, and are complicated to handle, resulting in inefficient irradiation work.

On the other hand, there are some that use ultraviolet light as a light source,
Ultraviolet and infrared rays damage the eyes and may cause skin cancer, so it is not recommended to use them.

<Problems to be Solved by the Invention> The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and its purpose is to provide visible light (400 nm to 760 nm) that is particularly safe for the body and that is effective against denture bases, etc. The key is to select a wavelength range of light that can quickly cure the photocurable dental composition without deforming it. Another object of the present invention is to use a light source that generates less heat relative to its electricity consumption.

Another object of the present invention is to use a light source to uniformly irradiate a dental material such as a denture base with light.

<Means for solving the problems> The present invention has been made to achieve the above objects, and
The gist is that it is an irradiation device that applies a photocurable dental composition to the surface of a dental material such as a denture base and irradiates it with light to polymerize a hard coating. Safe for your body.

A wavelength range adjusting agent is applied to either or both of the inner and outer surfaces of the fluorescent lamp so that the wavelength range of light that can rapidly cure the photocurable dental composition is 400 nm to 500 nm, and the light source is heated. This is a visible light irradiation device for curing the surface of dental materials, which uses a small amount of fluorescent light and has a circle-shaped fluorescent light so that light can be uniformly irradiated onto a denture base, etc. Here, the photocurable dental composition consists of a filler and a filler, and as monomers, all ethylenically unsaturated compounds can be used in dental compositions, but examples include methacrylic acid derivatives, such as 1-
Examples include lyethylene glycol dimethacrylate, tetramethylolmethane trimethacrylate, hexamethylene glycol dimethacrylate, and 2,2-bis(4-methacryloxyethoxyphenyl)propane, and fillers include apatite, soda glass, quartz, silica gel, and borosilicate glass. , synthetic sapphire (alumina) and barium oxide, radioactive opaque filling materials such as silicone glass are contemplated. Photocurable dental compositions that have been reprinted include Isobast, Vizio Disperse (trade name of Hakusui Boeki Co., Ltd.), Prorafilsha (trade name of Yoshida Co., Ltd.), Super Lux, Super Lux Delight (trade name of Shofu Sha Co., Ltd.), Microrest (product name of Menshi Dental Co., Ltd.), Schiller (
Examples include ``Jinja 3 Kai (product name)'', Adabuchitsuku (product name manufactured by J&J), and Clearfil-F (Kurashi product name). In addition, fluorescent lights should be placed around dental materials, above and below, front and back,
They are arranged so as to irradiate light from the left and right sides, and circular-shaped ones are used, but it is preferable to use a plurality of them in order to uniformly and evenly irradiate the dental material with light. Further, as an adjusting agent for adjusting the wavelength range of the light from the light source, fluorescent material 1 exhibiting an absorption spectrum that at least partially overlaps with the emission spectrum from the light source 1 For example, an alkali activated with divalent europium containing strontium as a main component. Earth metal halophosphate phosphors provide a strictly limited emission spectrum matched to the dental material to be treated. As this wavelength range adjusting agent, known fluorescent dyes are used, such as those described in DE 3001857 and DE 3235526. In the present invention, the wavelength range of light is set to 400 nm to 500 nm because
If the wavelength is below 400 nm, the wavelength of light is shorter than that of ultraviolet rays outside visible light, so it is dangerous to the body when handled.
This is because if the wavelength is 00 nm or more, green, yellow, orange, red, or infrared light outside of visible light, the denture base etc. may become distorted and deteriorate in quality due to heating.

In addition, the wavelength range of the light is preferably 460 nm to 470 nm in consideration of physical safety and sufficiently suppressing the heatable temperature.

<Function> The present invention applies a photocurable dental composition consisting of a mixture of a monomer as a methacrylic acid derivative and a filler such as silica gel to a dental material such as a denture base by spraying, brushing, or dabbing. , this is visible light, the wavelength of light is 40
A fluorescent lamp coated with a wavelength range adjusting agent on either or both of the inner and outer surfaces of the fluorescent lamp is irradiated so that the wavelength range is 0 to 500 nm, thereby polymerizing the photocurable dental composition on the surface of the dental material. to form a cured film.

A circular fluorescent lamp is used to evenly irradiate the surrounding area of the dental material with light in the above-mentioned wavelength range from the required locations.

In this case, by making the mounting table on which the dental material is placed rotatable, the light can be applied evenly and without gaps.

<Example> Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIGS. 1 and 2 are longitudinal sectional views showing other embodiments of the visible light irradiation device for curing the surface of dental materials of the present invention.

In FIG. 1, the irradiation device 1 has a lower main body 2 and a lid 3 that can be opened and closed by a hinge 4, etc., and a mounting table 6 on which a denture base 5 with a denture implanted thereon, which can be rotated by a motor or the like, is placed inside the main body. Set up. In addition, circle-shaped fluorescent lamps 7 and 8, which emit light in the wavelength range of 460 nm to 470 nm, are arranged on the main body 2 and the lid 3 so as to sandwich the denture base 5 of the mounting base 6, and condense the light. Increase efficiency and irradiate light from above and below. In this case, it is preferable to use a translucent member for the mounting table 6 in order to facilitate light irradiation from the fluorescent lamp 7 below. Further, the main body 2 and the lid 3 are provided with semicircular reflectors 9 and 10, respectively, so that the light from the fluorescent lamps 7 and 8 arranged above and below can be efficiently focused on the denture base 5. When the temperature inside the irradiation device 1 rises above a certain level due to heat generation from the fluorescent lamps, the cooling fan 11 is automatically rotated by a temperature sensor such as a thermostat, allowing outside air to enter from the bottom of the main body 1, thereby reducing the temperature inside the device. I'm trying to descend.

Note that 12 and 13 are lances for adjusting the appropriate voltages of the fluorescent lamps 8 and 9, and 14 and 15 are glow lamps. Further, 16 is a timer for setting the irradiation time of the fluorescent lamp and the rotation time of the mounting table 6 (normally 5 minutes);
is the ON-FF switch that turns on the fluorescent light.

When the surface of the dental material was irradiated with light using the irradiation device of the present invention, a hard coating that was durable for use was formed on the surface of the denture material.

In Fig. 2, the same parts as in Fig. 1 are indicated by the same numbers, but the different parts are that the mounting table is rotated by a motor 19 using a built-in battery 18 instead of relying on indoor power distribution, and Two large and small fluorescent lamps 20 and 21 are placed one on top of the other on the lid 3, and the dental material below is irradiated by these lamps.

In this embodiment as well, effects similar to those of the previous embodiment can be obtained.

<Effects of the Invention> The present invention provides that when a photocurable dental composition is applied to a dental material and a hard coating is polymerized by irradiating it with light, the light source is not from a conventional point or linear source but from a laser beam. Since the circular line is placed at the desired location such as the central lower position of the dental material, it is possible to irradiate the dental material which is the object to be irradiated evenly from above and below, from the front and back, and from the left and right. If you rotate it like this, the light will be illuminated evenly.

Furthermore, since the present invention handles light in the wavelength range of 400 nm to 500 nm, safety of workers and the like can be ensured, and molded dental materials of excellent quality can be obtained.

Since the present invention uses a fluorescent lamp, it has a longer lifespan than conventional xenon lamps, etc., and is not only inexpensive, but also easier to replace, etc., and has better effects than conventional products.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are longitudinal sectional views of different apparatuses of the present invention. 1. Irradiation device, 5. Dental material (denture base) 7°8.2
0.21... Circline-shaped fluorescent light.

Claims (1)

[Claims] In an irradiation device that applies a photocurable dental composition to the surface of a dental material such as a denture base and irradiates it with light to polymerize a hard coating, the light source of the irradiation device is located at a required location around the dental material. 1. A visible light irradiation device for curing the surface of dental materials, characterized in that the wavelength range of light from the fluorescent lamp is 400 nm to 500 nm.